What happens when materials with a low MIE are exposed to an ignition source?

When materials have a low Minimum Ignition Energy (MIE), they are more susceptible to ignition when exposed to an ignition source. This means that less energy is required to ignite these materials. A low MIE indicates that the material can catch fire or undergo combustion with minimal external energy input, making it easier for them to ignite compared to materials with a high MIE.

In practical terms, if a substance has a low MIE, even a small spark or heat source can be sufficient to initiate combustion. This property is critical in assessing the fire hazard risk of various materials, particularly in environments where ignition sources may be present. Understanding the concept of MIE helps in establishing safer handling practices and designing environments where potential ignition sources can be controlled or minimized.